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<title>Problem 2346. -- [Baltic 2011]Lamp -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>2346: [Baltic 2011]Lamp</h2><span class=green>Time Limit: </span>10 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>256 MB<br><span class=green>Submit: </span>230&nbsp;&nbsp;<span class=green>Solved: </span>101<br>[<a href='submitpage.php?id=2346'>Submit</a>][<a href='problemstatus.php?id=2346'>Status</a>][<a href='bbs.php?id=2346'>Discuss</a>]</center><h2>Description</h2><div class=content><p>2255是一个傻X，他连自己家灯不亮了都不知道。<br />
某天TZ大神路过他家，发现了这一情况，<br />
于是TZ开始行侠仗义了。<br />
TZ发现是电路板的问题，<br />
他打开了电路板，发现线路根本没有连上！！<br />
于是他强大的脑力可以使某个格子上的线路从\变为/，<br />
或者从/变为\。<br />
2255不会电路（因为他什么都不会），但是他想知道TZ最少要用多少次脑力才能使他家的灯变亮。<br />
如果无法变亮，输出&ldquo;NO SOLUTION&rdquo;。</p>
<p>n,m&lt;=500</p>
<p><img alt="" src="/JudgeOnline/upload/201106/a.jpg" /></p></div><h2>Input</h2><div class=content></div><h2>Output</h2><div class=content></div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>3 5<br />
\\/\\<br />
\\///<br />
/\\\\</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>1</span></div><h2>HINT</h2>
			<div class=content><p></p></div><h2>Source</h2>
			<div class=content><p><a href='problemset.html?search='></a></p></div><center>[<a href='submitpage.php?id=2346'>Submit</a>][<a href='problemstatus.php?id=2346'>Status</a>][<a href='bbs.php?id=2346'>Discuss</a>]</center>﻿<br>

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